docs: def _compute_mean(self, C, mag, dists, rake):
          """
          Compute and return mean value without site conditions,
          that is equations 2-5, page 970.
          """
          mean = (
              self._compute_magnitude_scaling_term(C, mag) +
              self._compute_geometric_decay_term(C, mag, dists) +
              self._compute_faulting_style_term(C, rake) +
              self._compute_anelestic_attenuation_term(C, dists)
          )
  
          return mean